I'm not really sure how many regulars and moderators are on this forum that are boaters too. Some of us are RV'ers but that's a lot different.

A quick search on Google, though, indicates that the Texas Fish & Wildlife Dept might be the one to contact regarding the safety certification course that you have to take. A look at their FAQ page indicates that courses start at $20 and are required for folks born in 1993 or later years.